368 APHIDS OF THE ROCKY MOUNTAIN REGION 
Colorado: Greeley and Fort Collins. Apterous viviparae March 30 to Nov. 2 
alate viviparae June 21; rather rare. 
Cotypes. Ill. Nat. Hist. Surv. Collection. 
Chief Distinguishing Characters. Protruding cauda and anal plate, moder- 
ately long rostral IV+-V (.15, barely as long as hind tarsal II), length of Ill 
(not exceeding .30), number of sensoria on III in alate vivipara (13-14). 
Prociphilus fraxinifolii (Riley) 
The Leaf-curl Ash Aphid 
Pemphigus fraxinifolii Riley, 1879:17; Thomas, 1879:146 and 210. 
Prociphilus fraxinifolii, Jackson, 1908: 211. Maxson and Knowlton, 1929:270; Gillette 
and Palmer, 1934:232. 
Fundatrix. Medium yellow-green to pale yellow; brown on head; flocculent; appendages 
brown. Body length’ 2-2.5; hind tibia .40-.55; hind tarsal II .14-.16; antenna .50-.60; rostrum 
attaining 2d coxa. Large wax glands present on head, 3 longitudinal rows on body. 
Spring AlateVi“ RB, 
wsyall¥C) (D tS 
14) + (02-03) Paurs 
of rare racic 
Apt: Viv. teoneab rig eis 
APS ‘ ’ yo 
6S saw a 03 LS ih au 
Fundatri: 
(.08-.19) G10-. 
20 
Apt. Mirgogenia 
a ie 
| 
=, >..2.2.-28($e a6 A3=16 (3-6 
all. “FS -. Sscen ae. .09-15B3- -6) J2-\5U- 4) yea St a) 
Fig. 444. Prociphilus fraxinifolii 
Apterous Vivipara. Body length 2.5; hind tibia .55-.70; antenna .80. 
Alate Vivipara. Fundatrigenia. Brown on head and thorax, yellow-green on abdomen; 
flocculent; appendages slightly dusky to black. Body length 2; fore wing 2.5; hamuli 2-3 in 
number; hind tibia .60-.76; antenna .80-.96; rostrum hardly attaining 2d coxa. Wax glands 
present on head, small, arranged in 2 longitudinal rows of 3, a pair varying in size on meso- 
thorax. 
Pseudo gall. Loosely to tightly rolled and curled leaves forming a mass on tips of twigs. 
Collections. As winter host, in curled leaves of Fraxinus americana. 
Throughout region. Fundatrices May 5 to 25, apterous viviparae May 25 to Sept. 
29, alate viviparae July 13 to Sept. 10; very common. 
Type. Possibly U.S.N.M. Lectotype and paratypes, Ill. Nat. Hist. Buty, No. 
2762 and 7167. 
Chief Distinguishing Characters. Character of the pseudo gall (the rather 
tightly curled leaves), number of sensoria on III of alate vivipara (fewer than 
10), length of III in alate vivipara (not greater than .30), length of rostral IV+V 
(.11-.12), and hyaline wings. 
Prociphilus venafuscus (Patch) 
The Smoky-winged Ash Aphid 
Pemphigus venafuscus Patch, 1909:319. 
Prociphilus venafuscus. Patch, 1918: 45; Gillette and Palmer, 1934:232. 
A ‘faite es 
a 
Masorhoracie 
Glands(Variatiorss) 
(45-54) (sen, /4-- 2) 
Fundatrigenia 
in OL mT 
(45-5) (Sen. 18-30) 
Fig. 445. Prociphilus venafuscus 
C 
G22-, “er. 
